This part of GB/T 17215.3 specifies the terms and definitions, classifications, technical requirements, accuracy classes and test methods of static meters connected via electronic transformer (hereinafter referred to as “meters”).
This document is only applicable to newly manufactured meters which have small (signal) analog input and are installed in the networks with a reference frequency of 50Hz or 60Hz to measure the a.c.electric energy and applies to their type tests only.
This document is applicable to the meters consisting of elements such as measuring unit and display enclosed together in a meter case.
This document may be used as reference for meters that have a small (signal) analog input only in the current circuit.
This document is not applicable to meters with digital inputs.
NOTE The transformers intended to connected to the meter refer to GB/T 20840.7-2007, GB/T 200840.8-2007 and DL/T 1155-2012.
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GB/T 17215.3的本部分仅适用于新制造的在50 Hz或60 Hz网络中测量交流无功电能的、经互感器接入的0.5S和1S级静止式无功电能表,以及直接接入的1级静止式无功电能表,并且仅适用于其型式试验。
本部分使用无功电能的传统定义,无功功率和电能仅由电流和电压的基波频率分量计算得来。见第3章。
注1:与GB/T 17215.323仅适用于正弦信号场合的无功功率和电能定义的方法不同,本部分中无功功率和电能定义适用于所有周期性信号。采用这种方法定义的无功功率和电能,可以使不同设计的仪表获得适当的测量的复现性。根据这一定义,无功功率和电能通常反映了可用电容器补偿的无用电流,而不是全部无用电流。
本部分仅适用于一个测量单元和一个或多个计度器包封在同一表壳内组成的户内和户外用的静止式无功电能表。它也适用于一个或多个工作指示器及一个或多个测试输出。如果仪表具有测量一种以上能量的测量单元(多能量仪表),或者有其他功能单元,如最大需量指示器,电子费率寄存器,时间开关,纹波控制接收器,数据通信接口等也包封在该表壳内,则相关标准同样适用于这些功能单元。
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